BackflowNear Test-Due Reminder

Backflow testing in Hazelwood, MO

124 backflow testing businesses work within 25 miles of Hazelwood, 2 of them based in town. Every one has testers on Missouri's certified backflow tester roster.

124 businesses within 25 miles
4 for-hire testers based in Hazelwood

Certified backflow testers near Hazelwood

What the badges mean
✓ MO Certified Backflow Tester Verified
A state roster lists at least one certified tester at this business, with a current certificate. The state sets the exam and renewal.
3 certified testers
How many certified testers the roster lists at this business.
★ 4.8 (25 reviews)
The Google rating, shown as Google reports it. It does not change the order.

Order is by our quality score, never by payment. How we verify listings.

C&R Mechanical

100/100
✓ MO Certified Backflow Tester Verified #06-9578 ★ 3.4 (14 reviews) 17 certified testers Backflow Testing

12825 Pennridge Dr, Bridgeton, MO 63044 · 2 mi from Hazelwood

Call (314) 739-1800 Details Website

Verified Oct 2026 · Unclaimed listing

Finch Plumbing

100/100
✓ MO Certified Backflow Tester Verified #06-9187 ★ 4.7 (3 reviews) 9 certified testers Backflow Testing

3377 Hollenberg Dr, Bridgeton, MO 63044 · 3 mi from Hazelwood

Call (314) 291-4300 Details Website

Verified Oct 2026 · Unclaimed listing

Green Turf Irrigation

100/100
✓ MO Certified Backflow Tester Verified #34-9805 ★ 4.9 (584 reviews) 9 certified testers Backflow Testing

73 Millwell Ct, Maryland Heights, MO 63043 · 4 mi from Hazelwood

Call (314) 739-0410 Details Website

Verified Oct 2026 · Unclaimed listing

KAMS Mechanical

100/100
✓ MO Certified Backflow Tester Verified #06-7692 2 certified testers Backflow Testing

14515 Missouri Bottom Rd, Bridgeton, MO 63044 · 4 mi from Hazelwood

Call (314) 475-1001 Details Website

Verified Oct 2026 · Unclaimed listing

Jarrell Mechanical

100/100
✓ MO Certified Backflow Tester Verified #13-13423 ★ 3.7 (25 reviews) 50 certified testers Backflow Testing

4208 Rider Trail N, Earth City, MO 63045 · 4 mi from Hazelwood

Call (314) 291-0100 Details Website

Verified Oct 2026 · Unclaimed listing

Deluca Plumbing

100/100
✓ MO Certified Backflow Tester Verified #06-10229 ★ 2.6 (10 reviews) 18 certified testers Backflow Testing

2466 Old Dorsett Rd, Maryland Heights, MO 63043 · 4 mi from Hazelwood

Call (314) 427-5551 Details Website

Verified Oct 2026 · Unclaimed listing

Byrd Plumbing

100/100
✓ MO Certified Backflow Tester Verified #34-10742 ★ 4.3 (23 reviews) 2 certified testers Backflow Testing

500 Little Hills Industrial Blvd, St Charles, MO 63301 · 5 mi from Hazelwood

Call (314) 867-5696 Details Website

Verified Oct 2026 · Unclaimed listing

Mechanical Solutions

100/100
✓ MO Certified Backflow Tester Verified #13-8149 ★ 4 (5 reviews) 5 certified testers Backflow Testing

2030 Altom Ct, St. Louis, MO 63146 · 5 mi from Hazelwood

Call (314) 342-1480 Details Website

Verified Oct 2026 · Unclaimed listing

Emco Refrigeration

100/100
✓ MO Certified Backflow Tester Verified #13-1876 ★ 5 (3 reviews) 2 certified testers Backflow Testing

10200 Page Industrial Blvd, St. Louis, MO 63132 · 6 mi from Hazelwood

Call (314) 427-7477 Details Website

Verified Oct 2026 · Unclaimed listing

Classic Aire Care

100/100
✓ MO Certified Backflow Tester Verified #32-12616 ★ 4.9 (5615 reviews) 2 certified testers Backflow Testing

1276 N Warson Rd, St. Louis, MO 63132 · 6 mi from Hazelwood

Call (314) 352-1111 Details Website

Verified Oct 2026 · Unclaimed listing

Murphy Co

100/100
✓ MO Certified Backflow Tester Verified #13-13424 ★ 4 (48 reviews) 66 certified testers Backflow Testing

1233 N Price Rd, St. Louis, MO 63132 · 6 mi from Hazelwood

Call (314) 997-6600 Details Website

Verified Oct 2026 · Unclaimed listing

Hydro Dynamics Corp.

100/100
✓ MO Certified Backflow Tester Verified #34-10436 ★ 4.5 (152 reviews) 12 certified testers Backflow Testing

9211 Olive Blvd, Olivette, MO 63132 · 7 mi from Hazelwood

Call (314) 997-0064 Details Website

Verified Oct 2026 · Unclaimed listing

Wiegmann Associates

100/100
✓ MO Certified Backflow Tester Verified #13-11576 ★ 4 (8 reviews) 6 certified testers Backflow Testing

650 Fountain Lakes Blvd, St Charles, MO 63301 · 8 mi from Hazelwood

Call (636) 940-1056 Details Website

Verified Oct 2026 · Unclaimed listing

GDS Irrigation

100/100
✓ MO Certified Backflow Tester Verified #43-8400 ★ 4.7 (50 reviews) 3 certified testers Backflow Testing

200 Clearview Dr, St Charles, MO 63303 · 9 mi from Hazelwood

Call (636) 724-8191 Details Website

Verified Oct 2026 · Unclaimed listing

Ozark Mechanical

100/100
✓ MO Certified Backflow Tester Verified #13-14144 ★ 5 (193 reviews) 2 certified testers Backflow Testing

2108 Parkway Dr, St Peters, MO 63376 · 10 mi from Hazelwood

Call (636) 317-1234 Details Website

Verified Oct 2026 · Unclaimed listing

Focal Pointe

90/100
✓ MO Certified Backflow Tester Verified #34-2665 ★ 4.8 (5 reviews) 2 certified testers Backflow Testing

11950 Missouri Bottom Rd, Hazelwood, MO 63042 · under 1 mile from Hazelwood

Call (636) 346-4837 Details Website

Verified Oct 2026 · Unclaimed listing

Cintas Fire

90/100
✓ MO Certified Backflow Tester Verified #32-13668 ★ 4.6 (52 reviews) 3 certified testers Backflow Testing

634 Lambert Pointe Dr, Hazelwood, MO 63042 · 1 mi from Hazelwood

Call (314) 227-9191 Details Website

Verified Oct 2026 · Unclaimed listing

Marmic Fire and Safety

90/100
✓ MO Certified Backflow Tester Verified #34-11613 ★ 3.3 (7 reviews) 2 certified testers Backflow Testing

12882 Pennridge Dr, Bridgeton, MO 63044 · 2 mi from Hazelwood

Call (314) 997-7445 Details Website

Verified Oct 2026 · Unclaimed listing

Meyer Landscaping

90/100
✓ MO Certified Backflow Tester Verified #32-1225 ★ 3.9 (14 reviews) Backflow Testing

11285 Florence Ave, St Ann, MO 63074 · 3 mi from Hazelwood

Call (314) 291-4700 Details Website

Verified Oct 2026 · Unclaimed listing

Omega Plumbing

90/100
✓ MO Certified Backflow Tester Verified #06-4317 4 certified testers Backflow Testing

4132 Shoreline Dr # E, Earth City, MO 63045 · 4 mi from Hazelwood

Call (314) 291-2003 Details

Verified Oct 2026 · Unclaimed listing

Hoffman Borthers

90/100
✓ MO Certified Backflow Tester Verified #32-9660 ★ 4.8 (608 reviews) Backflow Testing

3700 Rider Trail S Ste 100, Earth City, MO 63045 · 4 mi from Hazelwood

Call (314) 274-3978 Details Website

Verified Oct 2026 · Unclaimed listing

Design Aire

90/100
✓ MO Certified Backflow Tester Verified #13-6094 ★ 4.9 (2754 reviews) Backflow Testing

2550 Harley Dr, Maryland Heights, MO 63043 · 4 mi from Hazelwood

Call (314) 739-1600 Details Website

Verified Oct 2026 · Unclaimed listing

Plumbing Planning Corp.

90/100
✓ MO Certified Backflow Tester Verified #06-0671 ★ 4.3 (7 reviews) 9 certified testers Backflow Testing

11860 Dorsett Rd, Maryland Heights, MO 63043 · 4 mi from Hazelwood

Call (314) 739-0057 Details

Verified Oct 2026 · Unclaimed listing

Aqueduct Plumbing

90/100
✓ MO Certified Backflow Tester Verified #06-12316 2 certified testers Backflow Testing

2641 Chaucer Ave, St. Louis, MO 63114 · 4 mi from Hazelwood

Call (314) 423-3334 Details Website

Verified Oct 2026 · Unclaimed listing

S&S Plumbing Systems

90/100
✓ MO Certified Backflow Tester Verified #06-9195 ★ 5 (72 reviews) 2 certified testers Backflow Testing

143 S 5th St, St Charles, MO 63301 · 5 mi from Hazelwood

Call (636) 696-6661 Details Website

Verified Oct 2026 · Unclaimed listing

Metro guide: Backflow testing in St. Louis: every utility's rules, filing portals and published prices in one place.

Never miss your annual backflow test

Most water utilities require the backflow assembly on an irrigation, fire or commercial line to be tested every year, and a missed test can mean a shutoff notice. Tell us when yours was last tested in Hazelwood and we'll text you a month before it is due, with certified local testers ready to book.

Free. One text before your test is due. No spam, cancel anytime. Privacy

Backflow testing questions in Hazelwood

Who can test a backflow preventer in Hazelwood?

A tester certified by Missouri Department of Natural Resources. Your water utility may also keep its own list of testers allowed to file reports. Check the notice your utility sent.

How many certified backflow testers are based in Hazelwood?

4 testers who test for the public list Hazelwood as their base on Missouri's roster, and 124 testing businesses are within 25 miles.

How often do I need a backflow test?

Most utilities require a test when the assembly is installed and then every year. Your utility's notice gives the due date and how the tester files the report.

Roster: Missouri Department of Natural Resources, read October 6, 2026.

Approved list: WaterOne approved backflow testers, WaterOne.

Approved list: City of Nixa certified backflow testers, City of Nixa.

Keep looking

Find a tester Set reminder